#testing

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Testing is a crucial albeit difficult part of software delivery. Make sure your JavaScript apps are always spotless with the following compilation of free online tutorials, courses, and talks from our conferences. They'll take you on a journey from basics to advanced methods and even philosophical questions about testing.
TestJS Summit 2023TestJS Summit 2023
21 min
Everyone Can Easily Write Tests
Let’s take a look at how Playwright can help you get your end to end tests written with tools like Codegen that generate tests on user interaction. Let’s explore UI mode for a better developer experience and then go over some tips to make sure you don’t have flakey tests. Then let’s talk about how to get your tests up and running on CI, debugging on CI and scaling using shards.
TestJS Summit 2022TestJS Summit 2022
27 min
Full-Circle Testing With Cypress
Top Content
Cypress has taken the world by storm by brining an easy to use tool for end to end testing. It’s capabilities have proven to be be useful for creating stable tests for frontend applications. But end to end testing is just a small part of testing efforts. What about your API? What about your components? Well, in my talk I would like to show you how we can start with end-to-end tests, go deeper with component testing and then move up to testing our API, circ
TestJS Summit 2021TestJS Summit 2021
31 min
Test Effective Development
Top Content
Developers want to sleep tight knowing they didn't break production. Companies want to be efficient in order to meet their customer needs faster and to gain competitive advantage sooner. We ALL want to be cost effective... or shall I say... TEST EFFECTIVE!But how do we do that?Are the "unit" and "integration" terminology serves us right?Or is it time for a change? When should we use either strategy to maximize our "test effectiveness"?In this talk I'll show you a brand new way to think about cost effective testing with new strategies and new testing terms!It’s time to go DEEPER!
TestJS Summit 2021TestJS Summit 2021
33 min
Network Requests with Cypress
Top Content
Whether you're testing your UI or API, Cypress gives you all the tools needed to work with and manage network requests. This intermediate-level task demonstrates how to use the cy.request and cy.intercept commands to execute, spy on, and stub network requests while testing your application in the browser. Learn how the commands work as well as use cases for each, including best practices for testing and mocking your network requests.
Node Congress 2024Node Congress 2024
25 min
Testing Alternative Runtimes with Node and Vitest
A deep dive into how we built support for running Vitest tests in the Cloudflare Workers runtime. We'll start by giving an overview of the Cloudflare developer platform, including our open-source workerd JavaScript runtime and local simulator Miniflare. Next we'll talk about how Vitest works and provides support for custom runtimes, using Node.js as a driver to run tests in another environment. We'll describe the specifics of our custom Vitest pool, and how we added support for dynamic code evaluation to our runtime. Finally we'll talk about how we improved developer ergonomics with isolated per-test storage, test helpers for accessing Durable Object instances directly, and support for declarative HTTP request mocking., and how we created a service to build types for users' specific compatibility settings.
DevOps.js Conf 2024DevOps.js Conf 2024
26 min
Navigating the Chaos: A Holistic Approach to Incident Management
Incident management can be challenging and throw you curveballs with unexpected issues, resulting in data loss, downtimes, and overall money & hours of sleep going to waste, BUT! There are practical things you could do to make it a smoother process and handle it better.
Remember when we were at school, and people said - "Actively listening in class guarantees 50% prep for the upcoming test"?
The same goes for being proactive at work in ways that will instantly prepare you to manage incidents better (at night or in general).
In this talk, I'll cover the proactive ways you could take and incorporate into your day-to-day routine, in order to prepare you for a smoother and more efficient incident management process.
I will also show the best practices I've finalized over the years that helped me get a clear vision of how to manage production incidents in the quickest & efficient way possible.
Embracing the tips I'll give you will guarantee you'll not only talk the talk but also walk the walk when it comes to incident management.
TestJS Summit 2023TestJS Summit 2023
20 min
Revolutionizing JS Testing with AI: Unmasking the Future of Quality Assurance
"Revolutionizing JS Testing with AI: Unmasking the Future of Quality Assurance" is a forward-thinking talk that delves into the transformative power of AI in JavaScript testing. The presentation offers an enlightening exploration of AI Testing principles, practical applications, and future potential. By featuring AI-driven tools like Testim, ReTest, Datadog, and Applitools, this talk brings theory to life, demonstrating how AI can automate test case generation, optimize anomaly detection, and streamline visual regression testing. Attendees will also gain insights into the anticipated advancements in AI Testing for JavaScript. The talk concludes with a lively Q&A, inviting everyone to delve deeper into the world of AI and JavaScript testing. Be prepared to reimagine your QA process with AI!
TestJS Summit 2023TestJS Summit 2023
22 min
Testing Library: Everybody Uses It, But Nobody Understands It
Testing is an essential part of software development, but it can be a tricky and time-consuming process. The popular testing-library package is a widely used tool that helps developers write reliable and maintainable frontend tests based on a behavior driven approach, but many users are not fully aware of how it works. In this talk, I, as one of the maintainers of the package, give an in-depth look into testing-library. You will learn how testing-library is designed to encourage good testing practices and how it can help you write more maintainable tests.
TestJS Summit 2023TestJS Summit 2023
19 min
Exploring Node Modules for Test Automation
In my talk I will explore the challenges faced when trying to manage and maintain test code across multiple projects and what made me create my first Javascript module. I will showcase the process of building, publishing, and versioning it using the powerful capabilities of GitHub Actions. And finally, I will talk about the benefits of doing it.
TestJS Summit 2023TestJS Summit 2023
19 min
From Good to Great: Elevate Testing with Cypress Contract Tests
Discover the power of Cypress Contract Tests, a cutting-edge approach that takes your testing to new heights. In this presentation, we'll explore the concept of contract testing and how it ensures seamless communication between microservices. Then, we'll delve into the game-changing capabilities of Cypress, showcasing its unmatched potential to elevate your testing practices from good to great. Join us for insights, best practices, and real-world examples on how to integrate Cypress Contract Tests into your existing workflows, and revolutionize your testing strategy.
TestJS Summit 2023TestJS Summit 2023
17 min
We've Rested Long Enough, What's Next?
Many developers are familiar with consuming/designing RESTful APIs, but what about building and consuming GraphQL and gRPC APIs? What about event-driven or asynchronous APIs? What are the benefits and technical limitations of each? Let’s go down the rabbit hole and explore some of these API types as alternatives to REST.
TestJS Summit 2023TestJS Summit 2023
22 min
Measure and Improve Frontend Performance by Using Test Automation
Automated performance testing can help detect the harmful effects of code changes on application performance. Learn how to use tools like Lighthouse and Web Core Vitals in your CI and set performance thresholds to maintain optimal frontend performance in this session.
React Day Berlin 2023React Day Berlin 2023
31 min
Break the Race: Easy Race Condition Detection for React
Race conditions are among some of the most challenging to detect and reproduce issues. As such they pose a significant challenge in development notably in UI. In this talk, we explore how to detect race conditions by leveraging fuzzing techniques. We walk you through discovering the real problem of race conditions and how they impact user experience. We provide you tools and examples demonstrating how to easily detect them in your daily work thanks to tests relying on fuzzing. After that talk, we hope your React code will be race conditions free or at least that you will have the right tools to help you.
TestJS Summit 2023TestJS Summit 2023
27 min
Rise of the Robots
Discover the future of automated mobile application testing with a JavaScript-powered mechanical arm. During this talk we will explore the design, prototyping, and implementation of this cutting-edge solution, optimizing testing efficiency and precision on real mobile devices. We will also discuss the challenges of building a hardware solution for the real world, and how to overcome them.
TestJS Summit 2023TestJS Summit 2023
9 min
Visual Testing: Optimize Storybook and Win
One thing most people agree on is that UI's have multiple dimensions of complexity.Imagine you are at lunch with some of your team or family, and you get a Slack message that a portion of the site isn’t working.The Ad placement no longer loads on your money-generating news site that sees millions of monthly users.Or your login form loads infinitely after a user attempts to log in, and no one can access the application.The backend logic works and all API requests return 200 responses.It turns out we missed a loading state handler for the component, and the UI does not render correctly.How do we manage all of that?The conventional approach is to build the component on the application page where it is first used and manually test or use integration tests to verify UI.This approach makes it difficult to verify all the component states.Instead of all this overwhelm, you want a simple comparison of your UI and how it looks now after making changes.This is where Storybook + a visual regression testing tool come in!
TestJS Summit 2023TestJS Summit 2023
29 min
Stop Triaging Your Test Suite
At some point, we accepted that end-to-end tests will be flaky, it’s okay to add retries, and it’s best practice to quarantine bad tests. It doesn’t have to be this way!This talk will cover the most common reasons for flaky tests, how to debug them with a time travel debugger, and how to fix them. While flaky tests are a problem that is as old as testing, it turns out that when you can capture and inspect them with Browser DevTools and retroactive console logs, they are quite fixable. And a test suite that is free of flakes runs faster, more reliably, and helps catch more issues before they reach production.
TestJS Summit 2023TestJS Summit 2023
29 min
No More Flaky Tests!
In this talk, you’ll learn what flaky tests are, the importance of deterministic tests, the collateral effects of non-deterministic tests, the motives why tests can become brittle, and finally, what to do (and what not to do) when you find flaky tests
TestJS Summit 2023TestJS Summit 2023
27 min
What I Learned About Software Quality From The 10 Most Popular Javascript Projects On Github
It is very common for teams to have code review processes and this usually happens through pull requests. Each comment represents a step towards improving the quality of the software, however, there is a wide variety of points of view. The seniority of the team, the team itself, the company, the time left, the mentality, internal agreements, all of this impacts the way of reviewing code.

As a tester, I need to understand what happens in the code and when reviewing it, to identify flaws in the development process and improve my testing strategy.

In this talk, I will bring the results of research I carried out analyzing the comments contained in pull requests from the 10 most popular GitHub projects created in Javascript and bring some insights related to what I discovered. Among them: are which software quality characteristics are most exercised by Devs, which are weak points in their development process, where we can improve our tests to anticipate failures, and tools that can be used to test more comprehensively, among others.
React Summit US 2023React Summit US 2023
11 min
How Realm by MongoDB is Testing Native Modules “on device”
Running tests on Node.js is common practice for app and library developers. But when your library is integrating more deeply with the platform, operating system or JS engine, you need to run tests “on device” increases. The Realm JS team at MongoDB is faced with this challenge, as we’re maintaining a React Native library with native modules. In this talk I’ll share the “mocha-remote” package which we’ve built to help us run tests “on device” while getting reporting and remaining in control from the comfort of our terminals.
React Advanced Conference 2023React Advanced Conference 2023
28 min
Usability Testing Without a UX Specialist
Ask nearly anyone about the process of developing software, and somewhere in the answer they’ll (hopefully) mention the users. User research, user testing, user feedback – the end user is at the heart of everything that we build. However, for many companies, making conversations with real users actually happen is a real challenge – especially if you don't have a UX specialist on your team! If this is all sounding familiar to you, then I have a recommendation: take it into your own hands. In this session, we'll talk through setting up a basic user testing program and growing it, so you – the developer – can feel empowered to start usability testing for your own product!
JSNation 2023JSNation 2023
19 min
Three Ways to Automate Your Browser, and Why We Are Adding a Fourth: WebDriver BiDi
A journey through overwhelming ways to automate browsers. Join Michael on a journey to see what happens behind the scenes of "await page.goto('https://example.com');" et. al. See what pros and cons each of the three ways of browser automation have.
Understand why we are adding a fourth - WebDriver BiDi.
Vue.js London 2023Vue.js London 2023
22 min
Let’s Get Visual - Visual Testing in Your Vue.JS Project
Visual testing compares the appearance of your application with a previous state. If changes become visible, you can allow them or not. So you or your testers have their eyes everywhere - without needing to check manually repeatedly. I've been using visual testing for a while, saving my neck a few times. Let's look at my journey together and explore if and how visual testing can also help your projects.
Vue.js London 2023Vue.js London 2023
24 min
Testing Vue 3 Applications with Mock Service Worker
In this talk, we will discuss some best practices for testing Vue 3 applications. We will explore how the Mock Service Worker and the Vue Testing Library can aid us in testing Vue 3 applications closer to a real-live user situation. Attendees will leave with a solid understanding of how to effectively test their Vue 3 applications to ensure reliability and maintainability.
Vue.js London 2023Vue.js London 2023
33 min
Writing Good Tests for Vue Applications (e2e vs. Component Tests, Features of a *Good* Test)
The emergence of SPAs, and therefore logic-heavy client-side code, drastically changed the game for front-end developers. As a result, for the last couple of years, we have had to catch up with sophisticated techniques to build high-quality applications—one of the essential being testing.More and more people started to add tests to their Vue.js-powered applications. With varying degrees of success. The field is still relatively new, and we all need more experience in how to test client-side applications most effectively.With my talk, I want to walk through 1) how to come up with a solid testing strategy (tools and practices) and 2) work on a real-world example of how we combine E2E testing with component testing.I want to highlight some general principles from testing theory and then go into the practical application—live coding in a TDD manner.
TestJS Summit 2022TestJS Summit 2022
25 min
CCTDD: Cypress Component Test Driven Design
The first part of the talk will focus on a variety of patterns when using Cypress Component Testing and TDD to create React components. The code samples will be from Angular's Tour of Heroes to make the content relatable to a wider community. Currently I am working on a GitBook rewriting it in React using Cypress Component Tests, there should be plenty of content to distill into the talk.The second part of the talk will focus on test strategies, types of testing and where to apply them, and finally compare & contrast them to the familiar industry approaches.We will finish with key takeaways, sample application repos to help with learning, and rollout strategies.
TestJS Summit 2022TestJS Summit 2022
21 min
E2E Tests for Web3 Applications
Top Content
We will go through a brief explanation of what is Web3 and the architecture of a web3 application. Then we will talk about how to end-to-end test, its challenges, some test tools that are available, and a demo using cypress and metamask.Agenda: What is Web3; The Architecture of a Web3 Application; Web3 E2E Tests Introduction; Web3 E2E Tests Challenges; E2E Test Tools; Demo.
TestJS Summit 2022TestJS Summit 2022
11 min
Using Tests for What?!
In the talk I will explain the pains and problems of form validation Then I will explain the mental model of unit tests, and compare it to how we think about form validations.I will introduce vest with a bit of live coding showing its unit testing syntax.
TestJS Summit 2022TestJS Summit 2022
21 min
Challenges of Testing and Monitoring WebRTC Applications
The pandemic accelerated and ushered in the era of digital transformation. We’ve all been indoctrinated in conducting video calls with others from virtually any device and location.WebRTC is a centerpiece of this world, enabling users to reach out to one another directly from the comforts of their browsers and applications.In this session, Tsahi explains what exactly is WebRTC, how it is different from other web technologies and how you can assure that your WebRTC application gets adopted and successfully used by your clients.
TestJS Summit 2022TestJS Summit 2022
22 min
Beyond Rest - Contract Testing in the Age of gRPC, Kafka and GraphQL
Modern distributed architectures are more complex than ever before, with a majority of companies operating multiple languages, protocols and architectural styles. This poses significant challenges for engineering teams increasingly asked to deliver more at speed. Whilst the practice of contract testing rose to prominence during the RESTful microservices boom to address similar challenges, the problem statement has evolved. In this talk, we'll discuss these new challenges and demonstrate how contract testing is still as relevant as it has ever been in helping to solve them.
TestJS Summit 2022TestJS Summit 2022
22 min
Machine Learning based Unit Tesing in JavaScript
The talk covers the current scenario of writing test cases in JavaScript and the problems associated with the time and resources spent by companies to write the test cases and the lack of automation in this area.Then the talk will cover how AI and machine learning is being leveraged by tools such as Github Copilot and Ponicode to autogenerate test cases thus simplifying the software testing process.
TestJS Summit 2022TestJS Summit 2022
21 min
How to Choose an Automation Tool
What are the aspects you should think when choosing an automation framework. Some main differences on available frameworks.Explain the main differences between the most known frameworks for automation: Selenium, Cypress, Playwright and Robot Framework. Positives and negatives about the frameworks. Depending on the needs of the project your work what is the best framework to use. Small talk about how frameworks integrate with some test management tools.
TestJS Summit 2022TestJS Summit 2022
34 min
A Medley of Frontend and Backend Performance Testing
In this talk, I want to introduce you to both frontend and backend performance testing and why a medley of these testing activities are needed to make sure that your website is performant. I'll also give a quick walkthrough as to how tools such as xk6-browser can help with running both protocol-level (how performance testing is normally run through concurrent interactions at the protocol layer) and browser-level tests (testing with real browsers to provide a more realistic performance test).By the end of this talk, you should be equipped with new knowledge regarding frontend and backend performance testing which you can apply to your work projects.
React Advanced Conference 2022React Advanced Conference 2022
16 min
Automated Performance Regression Testing with Reassure
As developers we love to dive into performance metrics, benchmarks, compare one solution to another. Whether we enjoy it or not, we’re often required to fix performance issues in our React and React Native apps. But this process is not sustainable and prone to regressions, especially as the app and team grow. What’s worse, those issues are often discovered by your users, making their experience miserable. In my talk I’ll introduce you to Reassure—a performance regression testing library for React and React Native— which happens to be a missing piece in our automated testing and performance suites. Spotting problems before they hit production.
React Advanced Conference 2022React Advanced Conference 2022
29 min
How I Test a Million UI States with Every Merge — Visual Testing with Storybook
Error state, loading state, awkward breakpoint, bad data, poor formatting, browser support. Every component can result represent hundreds or thousands of discrete visual states. How do you test it? Manually disable the network — temporarily. Insert bad code — just for a minute. Paw at the edge of your screen. Hack local database fixtures to bits. Frontend development has so many dimensions. Time and variation result in an infinite number of UI possibilities. In this talk, we'll use Storybook to progressively develop, test, and document our work — automating the grunt work of UI development.
React Summit 2022React Summit 2022
9 min
Automated Application Security Testing
Traditional security testing for JS apps has focused on the front-end, but actual security issues most often lie in the backing REST API. Join StackHawk co-founder Scott Gerlach for a quick overview of why you need to rethink how you test your JS apps and how StackHawk can help you find and fix security bugs fast.
JSNation 2022JSNation 2022
24 min
a11y and TDD: A Perfect Match
Accessibility has been web development's ugly duckling for quite some time now. I often get asked, "when should you test for a11y in your apps?" My answer is simple, "right from the start!". Regardless of the framework considered - React, Svelte, Vue, YourOwn™️ - as developers we are in a privileged position to help the ugly duckling grow into a beautiful swan. How? By diving deep into the pond and harnessing the power of Javascript APIs to build the right components for your web apps. And how can do you know you are building them right? By pairing Test Driven Development with the Testing Library family. Ready to grow your web apps into swans?
Node Congress 2022Node Congress 2022
9 min
Automated Application Security Testing with StackHawk
Traditional security testing for Node and JS apps has focused on the front-end, but actual security issues most often lie in the backing REST API. Join StackHawk co-founder Scott Gerlach for a quick overview of why you need to rethink how you test your JS apps and how StackHawk can help you find and fix security bugs fast.
You can check the slides for Scotts's talk here.
TestJS Summit 2021TestJS Summit 2021
36 min
Effective Performance Testing to your Server with Autocannon
Top Content
Performance testing expertise that is developed for a long time. In order to measure your server performance you need a tool that can efficiently simulate a lot of abilities and give you good measurements according your analysing criteria.Autocannon NPM library gave me exactly that - that library is super easy to install and has a very simple API to work with. Within a really short amount of time you can start do performance testing to your application and get good measurements in development environment and in your performance labs, and generate complicated testing scenarios.In this talk I will introduce Autocannon, explain how to efficiently analyse your server performance with it, and show how it helped me to understand complicated performance issues in my Node.js servers. At the end of this lecture, developers will be able to have the ability to integrate a fast and easy tool in order to measure your server performance.
TestJS Summit 2021TestJS Summit 2021
33 min
Test your UI in the REAL Browser
Imagine writing a complex function without unit tests. You would have to verify every scenario manually, over and over again. Cumbersome, but that's how most teams build user interfaces.
Imagine if you could build UIs and test UIs in the same place. If your components included expectations for how they were supposed to behave, you'd know the instant they broke.Storybook provides an organized approach to building UIs. You document a component's use-cases as stories, which are then rendered in isolation. Stories are like tests, but for UI. Storybook interaction testing allows you to script interactions and check expectations in the story itself. That allows you to run and debug UI tests in the same environment UI components are developed for: your browser.
TestJS Summit 2021TestJS Summit 2021
30 min
Configuring Axe Accessibility Tests
Top Content
Axe-core is a popular accessibility testing engine that is used Google, Microsoft, and hundreds of other companies to ensure that their websites are accessible. Axe-core can even integrate into many popular testing frameworks, tools, and IDEs. In this advanced session, we'll be learning how to configure axe and its integrations to fine tune how it runs and checks your pages and code for accessibility violations.
TestJS Summit 2021TestJS Summit 2021
8 min
Who is Testing the Tests?
Have you ever wondered: "who's testing the tests"? Of course, tests are only valuable if they catch bugs, but how would one validate that? Well, let me tell you about mutation testing!
Mutation testing is the act of testing your test verifying that they catch bugs. Of course, you can do this manually inserting bugs and running the tests, but a mutation testing framework can do this for you!
Join me and learn the basics of mutation testing and how to use StrykerJS, the mutation testing framework for JavaScript or TypeScript.At the end of this talk, you'll be the one that is testing your tests, and it won't even cost you much time!
TestJS Summit 2021TestJS Summit 2021
8 min
E2E Tests for API – Saving Nerves and Hours
Having adequate test coverage means a lot for the good API. But what can make the whole life pathetic is endless mocking of data and functions for integration tests. Every time you've changed the code you need to fix the mock. After several iterations the correct thought is - what's went wrong?
Alternative approach is e2e tests for the API. Which require only minimal mocks and data preparation. The rest - pure code of your API. Change the code - e2e test remains the same.This talk is about my experience of switching from integration tests to e2e tests for the API, proc and cons and how I started to feel happy about tests.
TestJS Summit 2021TestJS Summit 2021
21 min
Tests That Help you Find Defects Faster
This talk is about common mistakes people make when writing tests.
Mixing multiple concerns inside tests is tempting because it can feel like painting the whole picture. However, it obfuscates the root cause when a test fails. Setup methods are great but when developers are too focussed on keeping their tests DRY they can easily lead to test interdependence. Therefore, some principles we have learned to build our software we need to unlearn when it comes to testing.
The talk highlights more aspects like bloated tests which make it hard to figure out what they are about and proper usage of assertions to get better error messages.Especially if you don't work with TDD it can be easy to come up with a test that looks good but stands in your way when it fails.
The talk will have a look at the four scenarios I outlined above, explain why it makes sense to think about them and actionable suggestions how to improve tests.
TestJS Summit 2021TestJS Summit 2021
20 min
It's a (Testing) Trap! - Common Testing Pitfalls and How to Solve Them
It’s a trap” - a call or feeling we all might be familiar with, not only when it comes to Star Wars. It’s signalizing a sudden moment of noticing imminent danger. This situation is an excellent allegory for an unpleasant realization in testing. Imagine having the best intentions when it comes to testing but still ending up with tests failing to deliver you any value at all? Tests who are feeling like a pain to deal with?
When writing frontend tests, there are lots of pitfalls on the way. In sum, they can lead to lousy maintainability, slow execution time, and - in the worst-case - tests you cannot trust. But it doesn’t have to be that way. In this session, I will talk about developers’ common mistakes (including mine), at least from my experience. And, of course, on how to avoid them. Testing doesn’t need to be painful, after all.
TestJS Summit 2021TestJS Summit 2021
18 min
Predictive Testing in JavaScript with Machine Learning
This talk will cover how we can apply machine learning to software testing including in Javascript, to help reduce the number of tests that need to be run.We can use predictive machine learning model to make an informed decision to rule out tests that are extremely unlikely to uncover an issue. This opens up a new, more efficient way of selecting tests.
TestJS Summit 2021TestJS Summit 2021
32 min
Selenium 4 – What's New and How you Can Use it!
Selenium 4 is out and going forward Selenium Webdriver will be completely W3C standardized. Browsers such as Chrome, Safari, Firefox, IE and Edge follow W3C standardization, bringing more standard and stability around selenium commands working uniformly across different real browsers.
Join David Burns, Core Contributor to Selenium as he talks about how this would impact your tests and about the brilliant new features that you can start using straight away. David will show how you can access a site protected basic authentication, identify a DOM mutation, get JS errors or console messages as they happen, use new Print and Window APIs to help with your testing and more.
TestJS Summit 2021TestJS Summit 2021
8 min
Why Tracing is a Lifesaver for E2E Tests of Distributed Systems?
Contemporary software systems are often built on a microservices architecture pattern. In this pattern, rather than build one huge code-base for a single application, systems are separated into multiple smaller code-bases. These implement services that provide a specific feature, like authentication or monitoring, and those services can have performance problems, network issues, or bugs in their code – any of which can lead to failing tests. If you want to solve such problems, you have to go a step further than just logging your errors – it is best for you to monitor your tests with distributed tracing. This talk will show you why a tracing system will rescue you from the complexity of understanding why an E2E test has failed in a distributed architecture.
TestJS Summit 2021TestJS Summit 2021
9 min
Automated Application Security Testing
With StackHawk, engineering teams can run security tests against JS applications and the backing APIs to find and fix vulnerabilities faster. With automated testing on every PR, you can be confident that your app is secure. Join StackHawk co-founder Scott Gerlach for a quick overview of JS application security testing with StackHawk.
TestJS Summit 2021TestJS Summit 2021
10 min
JS Do It.....Accurate Security Testing Automation for Developers
NeuraLegion's developer friendly security scanner enables development teams to run dead accurate security tests on every build as part of their pipeline. False alerts and periodic infrequent scanning results in technical and security debt, as well as insecure product. But what is developer first DAST, when and how should you be integrating it into your pipelines and what should you be looking for when enhancing your security testing automation? Join this talk to get up to date.
TestJS Summit 2021TestJS Summit 2021
8 min
Who Guards the Guards? – Finding Bugs in Your Tests
Nowadays, testing has become the norm. There are many tools available to write different kinds of tests. While tests keep the guard on the main code of the application, how can you be sure that you don’t have bugs hiding in your test code? Should you write tests for the tests?In this lighting talk I will show you a different approach on how you can eliminate certain types of issues from your tests using static code analysis tools like SonarLint or SonarQube. We will focus on common issues found in tests using frameworks such as Mocha and Chai.
TestJS Summit 2021TestJS Summit 2021
10 min
Test Time Execution! Why it Can't be Ignored?
For modern agile teams, release velocity is very critical. Unfortunately, one of the biggest bottlenecks for faster release velocity is testing times. Even after teams implement end-to-end test automation, long testing times significantly delay the pipelines. This delay means developers get feedback of their efforts very late, which can snowball, affecting the shipping velocity. Hence test execution time becomes one of the most critical KPIs for any business that wants to ship features faster than the approaching deadlines. LambdaTest helps modern dev teams release faster executing tests faster on a scalable, reliable test cloud.
TestJS Summit 2021TestJS Summit 2021
31 min
How Low-Code Enables Continuous Testing in DevOps
As an industry, we understand that effective test automation is a key enabler - or inhibitor to - realizing the potential of DevOps. While automation is critical to innovating with speed and quality, very few of us are happy with the results. This talk will cover how low-code test automation solutions - like mabl - enable teams to embed automated tests directly into the development pipeline, strategies to overcome traditional challenges with test automation, and how to build a foundation for an efficient and effective test strategy.
TestJS Summit 2021TestJS Summit 2021
17 min
Are we Forever Doomed to Software Supply Chain Security?
The adoption of open-source software continues to grow and creates significant security concerns for everything from software supply chain attacks in language ecosystem registries to cloud-native application security concerns. In this session, we will explore how developers are targeted as a vehicle for malware distribution, how immensely we depend on open-source maintainers to release timely security fixes, and how the race to the cloud creates new security concerns for developers to cope with, as computing resources turn into infrastructure as code.
TestJS Summit 2021TestJS Summit 2021
27 min
Go Find What We May Have Missed!
Coming into software with an exploratory testing mindset is like coming to a multi-layer canvas with lots of information and an open ended task: find what we may have missed! This is the assignment for us all in software teams in our quest for quality.
Framing the search of how our system falls short of expectations is easier when we are able to see software from its user’s perspective. However, useful tests aren’t a collection of end-to-end tests we automate, but great tests to leave behind will decompose the testing problem differently. In this talk, we learn about using architecture as a filter in decomposing tests and look at an example of taking control over the API responses to test a React frontend.
Users don’t know or care if the problem is in the frontend and services your team provided if it fails to meet their expectations but you care. Granularity of feedback matters. Recognizing the same problems in incomplete scope - half-done features or only in frontend or APIs - is a skillset the software industry needs to be building.
React Advanced Conference 2021React Advanced Conference 2021
23 min
Gaining Confidence with Cypress Tests
Have you ever wanted to refactor mercilessly but didn't want to break the fragile tower? Or have you ever pushed to production only to spend the next few days cleaning up the regressions? You need end-to-end tests, and Cypress is a great, fast way to build them. With a simple JavaScript or TypeScript interface, you can automate browsers to hit those critical functions in your app to prove it works as expected -- this time and every time. Join us to dive into building Cypress tests and leave with confidence to refactor your way to greatness.
React Finland 2021React Finland 2021
25 min
Integration Testing for React Native Apps
My unpopular opinion is that testing is ... important. How do you test your React Native apps? In this presentation I will show how to run full integrations tests using Cypress while the RN app is running in the browser. This method can cover most of the application's code and be effective at finding logical errors and mistakes when calling the server APIs.
React Finland 2021React Finland 2021
28 min
Testing the integrity of your React components by publishing in a private registry
The final stage of a react component is when it is being published and distributed. How can I ensure my packages won’t crash in production? This talk will help you to test your React components publishing them to a private registry and running End-to-End tests against them.
Node Congress 2021Node Congress 2021
29 min
Using Feature Flags to Enable Testing in Production
How do you know your feature is working perfectly in production? If something breaks in production, how will you know? Will you wait for a user to report it to you? What do you do when your staging test results do not reflect current production behavior? In order to test proactively as opposed to reactively, try testing in production! You will have an increased accuracy of test results, your tests will run faster due to the elimination of bad data, and you will have higher confidence before releases. This can be accomplished through feature flagging, canary releases, setting up a proper CI/CD pipeline, and data cleanup. You will leave this talk with strategies to mitigate risk, to better your understanding of the steps to get there, and to shift your company’s testing culture, so you can provide the best possible experience to your users. At the end of the day, we don't care if your features work in staging, we care if they work in production.
JSNation Live 2020JSNation Live 2020
35 min
I See What is Going on: Visual Testing for Your Components
Many modern web frameworks use components as their building blocks.
In this talk, I will show component testing using Cypress - and I mean "show" literally. You will see the component running inside a real browser, you will interact with the component like a real user, and you can debug the component using the real browser's DevTools. Finally, I will go through the current open source and commercial options for visually testing the component's styles and rendering.
React Summit 2020React Summit 2020
34 min
Fantastic Bugs and Where to Find Them
Every bug is different: Some are lurking around for months, others appear suddenly after the upgrade of a dependency. Some are introduced us, others other teams or systems. Some are painfully obvious and affect all users, others only occur in edge (cases). And the ways of finding, and eventually, preventing them, are just as diverse: be it snapshot, unit, integration, end to end tests or automated visual tests, every kind comes with its challenges and opportunities. Testing UIs is hard, but in the end, only test automation can give us the confidence we need to move fast and refactor our code relentlessly. In this talk we are going to look at what kinds of bugs there are, which tests are most effective for catching which, and how we can implement them using modern front end technologies.
TestJS Summit - January, 2021TestJS Summit - January, 2021
9 min
Visual Regression Under the Hood
Visual regression is one of the hardest part in UI testing. And you will likely agree that it is extremely powerful. But how it works? What the problem it is solving under the hood? Why people choose visual regression services and how we build the fastest visual regression tool in the world :)
TestJS Summit - January, 2021TestJS Summit - January, 2021
8 min
The Life-Changing Magic of Tidying Up your Test Warnings
Even though we write tests for our web applications, the reality is that bugs still happen. Fortunately, many of these are easily preventable paying more attention to the warnings from our apps. However, it's often so easy to put them under the rug and never come back until we find a bug in production, which leads to hundreds if now thousands of warnings appearing in our test output. This talk is about how to prevent this situation and how to get out of it.
TestJS Summit - January, 2021TestJS Summit - January, 2021
8 min
Testing React: A Convert’s Journey from Enzyme to Testing Library
Testing Library's advantages over Enzyme for testing React:
- Opinionated framework enforces best testing practices (test behavior, not integration) - Opinions on how to find elements ( role) encourages accessibility - jest-dom assertions lead to simple, readable tests - ESLint plugins help encourage best practices in real time - test output helps locate elusive elements
There will be a few code examples, but this is largely a discussion (rather than a how-to).
TestJS Summit - January, 2021TestJS Summit - January, 2021
28 min
Writing Testable Serverless Apps Using Hexagonal Architecture
According to many polls, testing serverless applications and fear of the cloud vendor lock-in are among the top five challenges organizations face when adopting serverless. We often hear that using serverless effectively requires a mind shift. But what does that mean? Do we need new tools and strategies for testing serverless applications, or can we use existing tools we already use for our non-serverless applications? And what about cloud vendor lock-in? Is that a real thing or just a fictional story that scares people away from serverless? Can we decrease a risk of vendor lock-in using a well-known architecture, such as hexagonal architecture?
TestJS Summit - January, 2021TestJS Summit - January, 2021
25 min
Beyond API Mocking
Mocking is one of the best techniques to separate concerns during testing. When it comes to API mocking, we tend to either stub a request client or replace it with a mocked counterpart entirely. What we’re doing is altering the tested system so it makes requests to a different source, or doesn’t make them at all. That’s mainly because there was no better option. Until now.
In this talk, we’ll go through how to efficiently use API mocking that retains the integrity of your JavaScript application and results in more confident tests. On top of that, I’ll illustrate how to reuse the same mocks on different testing levels, as well as during development and debugging. All that with a single tool in your arsenal.